Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01D—SEPARATION
  • B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
  • B01D47/06—Spray cleaning

Definitions

• the present invention addresses an apparatus and a method for wet scrubbing of pollutants in air and flue gases.
• Wet scrubbing apparatuses are known for removing particulates from flue gases and air.
• the object of the present invention is to obviate, at least partially, the drawbacks of prior art and particularly, the above mentioned drawbacks.
• FIG. 1 is a longitudinal sectional view of the apparatus
• FIG. 1 is a side view of the apparatus
• FIG. 3 is a side view of a detail of the apparatus
• - Figure 4 is a side view of another detail of the apparatus;
• - Figure 5 is a first cross sectional view of the apparatus;
• FIG. 7 is a side sectional view of an alternative embodiment of the apparatus.
• the wet scrubbing apparatus comprises a central chamber 1, which extends in a substantially and/or generally vertical direction, and has an inlet 2 at its bottom for the gas and/or flue gases to be purified.
• the central chamber 1 is surrounded by a plurality of chambers 3, 4 in a substantially concentric arrangement around the central chamber 1.
• the central chamber 1 and the concentric chambers 3, 4 are connected in series and the outermost concentric chamber 4 has one or more outlets 5.
• the central chamber 1 and the concentric chambers 3, 4 are formed by a plurality of elements 13, 14, 15 having a tubular shape or other with square or round section shapes.
• tubular elements 13, 14, 15 are made of steel, more preferably of stainless steel.
• Suitable air delivery means 6 are provided, typically an adjustable-speed fan, situated upstream or downstream from the central chamber 1 or inside it to generate a current of air and/or flue gases that sequentially travels from the central chamber 1 to the concentric chambers 3, 4.
• each chamber 3, 4 has a generally annular manifold 27 which has the nozzles 7 connected thereto.
• Valves may be further provided for separately adjusting the flow rate of the water sprayed
• the droplets of water sprayed into the concentric chambers 3, 4 retain the particulates contained in air or in the flue gases which travel through the concentric chambers 3, 4 and fall into a water collection tank 9.
• the water collected in the tank 9, after being filtered, is delivered again to the nozzles 7.
• the collection tank 9 may be equipped with a drain valve (see Fig. 4) for draining the tank when needed.
• the gas and/or flue gas stream flowing up through the central chamber 1, repeatedly flows up and down through the concentric chambers 3, 4 and is alternately subjected to a wash and backwash action.
• a mechanical filter 11, for instance a layer of nonwoven fabric may be provided at the outlet 5 of the wet scrubber apparatus to retain the residual particulates from the washing process.
• At least one perforated plate 12 or wire gauze 10 is provided in each concentric chamber 3, 4.
• wire gauzes 10 have a mesh of not less than lxl mm and not more than 10x10 mm.
• the mesh of the wire gauze 10 is dependent on the relevant application of the system and on the pollutant to be treated.
• the gauzes 10 may be mounted in closely spaced pairs, one above the other.
• perforated plates 12 are mounted in closely spaced pairs, otherwise gauzes 10 are provided in pairs with perforated plates 12.
• the central chamber 1 and the concentric chambers 3, 4 have increasing sections, whereby the gas stream has a decreasing speed as it passes from one chamber to the other.
• the particulates collected in the tank 9 tend to form a slurry which prevents proper operation of the apparatus.
• the water collected in the tank 9 is transferred to an underlying filtering tank 32, for removal of the suspended particles therefrom.
• the filtered water is pumped to the nozzles 7 by a pump 8.
• the filtering tank 32 includes a plurality of mechanical filters 33, 34, 35, 36 having an increasing filtering degrees, which are arranged in series.
• the first filter 33 may have a filtering degree, as needed, of 250 ⁇ m to about
• the water level in the filtering tank 32 is adjusted by a valve 20, which is driven by a level switch 21.
• a manually or electrically operated drain valve 22 is further provided to drain the filtering tank 32 when needed.
• the fan 6 is situated downstream from the scrubber apparatus (Fig. 6), i.e. at or near the outlet 5 of the outermost concentric chamber 4.
• the above described apparatus can be adapted to a variety of needs, particularly for purifying gases from civil or industrial heating boilers, conditioning systems downstream from air intakes, carpenter shops, mechanical or metal and mechanical shops, etc.
• the apparatus is mounted on a special metal frame 30 and has a switchboard 31 which includes a thermomagnetic safety device and a speed control for the fan 6.
• the electric panel 31 further includes an audible and visual alarm system, for signaling any failure in the electric and drive system or water missing conditions in the tank 9.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Separation Of Particles Using Liquids (AREA)
• Treating Waste Gases (AREA)
• Filtering Of Dispersed Particles In Gases (AREA)
• Weting (AREA)
• Detergent Compositions (AREA)
• Manipulation Of Pulses (AREA)
• Measuring Phase Differences (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
• Vending Machines For Individual Products (AREA)
• Buildings Adapted To Withstand Abnormal External Influences (AREA)

Priority Applications (7)

Applications Claiming Priority (2)

Publications (2)

Family

ID=32983206

Family Applications (1)

Country Status (13)

Cited By (2)

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Citations (3)

Family Cites Families (25)

• 2003
  • 2003-03-13 IT IT000476A patent/ITMI20030476A1/it unknown
• 2004
  • 2004-03-12 DE DE602004008233T patent/DE602004008233T2/de not_active Expired - Lifetime
  • 2004-03-12 JP JP2006506331A patent/JP4908198B2/ja not_active Expired - Fee Related
  • 2004-03-12 RU RU2005128184/15A patent/RU2331458C2/ru not_active IP Right Cessation
  • 2004-03-12 EP EP04720101A patent/EP1601441B1/de not_active Expired - Lifetime
  • 2004-03-12 KR KR1020057017131A patent/KR100769281B1/ko not_active IP Right Cessation
  • 2004-03-12 CA CA2518382A patent/CA2518382C/en not_active Expired - Fee Related
  • 2004-03-12 ES ES04720101T patent/ES2293238T3/es not_active Expired - Lifetime
  • 2004-03-12 PL PL04720101T patent/PL1601441T3/pl unknown
  • 2004-03-12 US US10/547,522 patent/US7585354B2/en not_active Expired - Fee Related
  • 2004-03-12 CN CNB2004800066709A patent/CN100528289C/zh not_active Expired - Fee Related
  • 2004-03-12 WO PCT/IB2004/000705 patent/WO2004080572A1/en active IP Right Grant
  • 2004-03-12 AT AT04720101T patent/ATE369904T1/de not_active IP Right Cessation

Patent Citations (3)

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